More About Composites (3) Production Method - Filament Winding
Filament Winding
under the condition of controlling tension and predetermined line shape, the continuous fiber or cloth tape is dipped into resin glue solution by special winding equipment
wound on the core mold or inner liner continuously, evenly and regularly
solidified under a certain temperature environment
A) Wet winding: the process of winding the roving directly onto the mandrel after dipping.
Features: no need of pre impregnation equipment, less equipment investment; easy material selection; strict control of yarn quality and tension, easy to produce bubbles during curing.
B) Dry winding: a molding process in which the prepreg tape (or prepreg cloth) is heated to a viscous flow state on the winding machine and wound on the mandrel
Features: stable product quality (glue content, size, etc.); fast winding speed (100-200m / min); good labor and health conditions; large investment in prepreg equipment. At present, the former is widely used.
Advantages and disadvantages of winding process
advantage
Rapid process
High degree of automation
The resin content can be controlled
Reduce fiber waste
High fiber content and high structural properties
Shortcomings
The axial reinforcement of the product is difficult
expensive core molds and equipment
The shape of the product is limited by the process
